Industrial roof ventilator. Australian made. Silver finish. Supply only - installation is not included. Must be installed by a licensed installer. Refer to the manufacturer's installation instructions supplied with the product. Specifications • Head width: 625 mm • Head height: 405 mm • Base height: 280 mm • Vent throat: 450 mm • Flashing base: 740 (W) x 640 (L) mm • Base type: Square to Round